Merge "Add 3d transformation test."

            </intent-filter>

        </activity>

        <activity

                android:name="Transform3dActivity"

                android:label="_3d">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

/*

 * Copyright (C) 2010 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.google.android.test.hwui;

import android.app.Activity;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Camera;

import android.graphics.Canvas;

import android.graphics.Matrix;

import android.os.Bundle;

import android.view.View;

@SuppressWarnings({"UnusedDeclaration"})

public class Transform3dActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        final Transform3dView view = new Transform3dView(this);

        setContentView(view);

    }

    static class Transform3dView extends View {

        private final Bitmap mBitmap1;

        private Camera mCamera;

        private Matrix mMatrix;

        Transform3dView(Context c) {

            super(c);

            mBitmap1 = BitmapFactory.decodeResource(c.getResources(), R.drawable.sunset1);

            mCamera = new Camera();

            mMatrix = new Matrix();

        }

        @Override

        protected void onDraw(Canvas canvas) {

            super.onDraw(canvas);

            canvas.drawARGB(255, 255, 255, 255);

            final float centerX = getWidth() / 2.0f - mBitmap1.getWidth() / 2.0f;

            final float centerY = getHeight() / 2.0f - mBitmap1.getHeight() / 2.0f;

            final Camera camera = mCamera;

            final Matrix matrix = mMatrix;

            rotate(centerX, centerY, camera, matrix, 32.0f);

            drawBitmap(canvas, centerX, centerY, 0.0f, matrix);

            rotate(centerX, centerY, camera, matrix, 12.0f);

            drawBitmap(canvas, centerX, centerY, -mBitmap1.getWidth(), matrix);

            rotate(centerX, centerY, camera, matrix, 52.0f);

            drawBitmap(canvas, centerX, centerY, mBitmap1.getWidth(), matrix);

            rotate(centerX, centerY, camera, matrix, 122.0f);

            drawBitmap(canvas, centerX, centerY, mBitmap1.getWidth() * 2.0f, matrix);

        }

        private void drawBitmap(Canvas canvas, float centerX, float centerY, float offset,

                Matrix matrix) {

            canvas.save();

            canvas.translate(offset, 0.0f);

            canvas.concat(matrix);

            canvas.drawBitmap(mBitmap1, centerX, centerY, null);

            canvas.restore();

        }

        private void rotate(float centerX, float centerY, Camera camera,

                Matrix matrix, float angle) {

            camera.save();

            camera.rotateY(angle);

            camera.getMatrix(matrix);

            camera.restore();

            matrix.preTranslate(-centerX, -centerY);

            matrix.postTranslate(centerX, centerY);

        }

    }

}